LTC3824IMSE#PBF Linear Technology, LTC3824IMSE#PBF Datasheet

IC CNTRLR STP DWN HV 10-MSOP

LTC3824IMSE#PBF

Manufacturer Part Number
LTC3824IMSE#PBF
Description
IC CNTRLR STP DWN HV 10-MSOP
Manufacturer
Linear Technology
Type
Step-Down (Buck)r
Datasheet

Specifications of LTC3824IMSE#PBF

Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
0.8 ~ 36 V
Current - Output
2A
Frequency - Switching
200kHz ~ 400kHz
Voltage - Input
4 ~ 60 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
10-MSOP Exposed Pad, 10-HMSOP, 10-eMSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-

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Manufacturer
Quantity
Price
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Part Number:
LTC3824IMSE#PBFLTC3824IMSE
Manufacturer:
LT
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Company:
Part Number:
LTC3824IMSE#PBFLTC3824IMSE#TRPBF
Manufacturer:
LT
Quantity:
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FeaTures
applicaTions
n
n
n
n
n
n
n
n
n
n
n
n
n
Typical applicaTion
5.5V TO 60V
Wide Input Range: 4V to 60V
Current Mode Constant Frequency PWM
Very Low Dropout Operation: 100% Duty Cycle
Programmable Switching Frequency:
200kHz to 600kHz
Selectable High Efficient Burst Mode
40µA Quiescent Current
Easy Synchronization
8V, 2A Gate Drive (V
Voltage P-Channel MOSFET
Programmable Soft-Start
Programmable Current Limit
Available in a Small 10-Pin Thermally Enhanced
MSE Package
Industrial and Automotive Power Supplies
Telecom Power Supplies
Distributed Power Systems
100V
33µF
V
C
392k
IN
IN
+
0.1µF
R
GND
SYNC/MODE
0.1µF
C
SET
SS
CAP
LTC3824
5V/2A Buck Converter
CAP
V
C
CC
10k
SENSE
3.3nF
GATE
> 10V) for Industrial High
V
V
CC
FB
R
0.025Ω
S
22µH
®
51Ω
Operation:
100pF
422k
80.6k
3824 TA01
C
100µF
×2
OUT
DescripTion
V
5V
2A
The LTC
to drive an external P-channel MOSFET. With a wide input
range of 4V to 60V and a high voltage gate driver, the
LTC3824 is suitable for many industrial and automotive
high power applications. Constant frequency current mode
operation provides excellent performance.
The LTC3824 can be configured for Burst Mode operation.
Burst Mode operation enhances low current efficiency
(only 40µA quiescent current) and extends battery run
time. The switching frequency can be programmed up to
600kHz and is easily synchronizable.
Other features include current limit, soft-start, micropower
shutdown, and Burst Mode disable.
The LTC3824 is available in a 10-lead MSE power package.
L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5731964.
OUT
High Voltage Step-Down
®
3824 is a step-down DC/DC controller designed
Efficiency and Power Loss vs Load Current
100
90
80
70
60
50
Controller With 40µA
10
EFFICIENCY
POWER LOSS
Quiescent Current
LOAD CURRENT (mA)
100
V
IN
= 40V
V
V
IN
IN
V
IN
= 12V
= 40V
= 12V
1000
LTC3824
3824 TA01a
2000
2.5
2.0
1.5
1.0
0.5
0
3824fg
1

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LTC3824IMSE#PBF Summary of contents

Page 1

... Other features include current limit, soft-start, micropower shutdown, and Burst Mode disable. The LTC3824 is available in a 10-lead MSE power package. L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5731964. ...

Page 2

... Storage Temperature Range ..................... –65° to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C orDer inForMaTion LEAD FREE FINISH TAPE AND REEL LTC3824EMSE#PBF LTC3824EMSE#TRPBF LTC3824IMSE#PBF LTC3824IMSE#TRPBF LTC3824HMSE#PBF LTC3824HMSE#TRPBF LTC3824MPMSE#PBF LTC3824MPMSE#TRPBF LEAD BASED FINISH TAPE AND REEL LTC3824EMSE ...

Page 3

T outputs, unless otherwise specified. PARAMETER V Low C V Source Current C V Sink Current C V Threshold for Switching Off C Soft-Start Current Burst Mode Threshold ...

Page 4

LTC3824 elecTrical characTerisTics Note 3: This parameter is tested in a feedback loop that servos V reference voltage with the V pin forced to 1V. C Note 4: This specification represents the maximum voltage on V switching (GATE pin) is ...

Page 5

Typical perForMance characTerisTics Burst Mode Disabled 200mA, V LOAD I = 200mA LOAD V OUT 10mV/DIV INDUCTOR CURRENT 1A/DIV 4µs/DIV Burst Mode Operation V V =12V 5V OUT V OUT 50mV/DIV INDUCTOR CURRENT ...

Page 6

LTC3824 pin FuncTions GND (Pin 1): Chip Ground Pin. SYNC/MODE (Pin 2): Synchronization Input and Burst Mode Operation Enable/Disable. If this pin is left open or pulled higher than 2V, Burst Mode operation will be enabled at light load and ...

Page 7

DiagraM + + 1.1V SS – 1.8V 2.5V 0.3µA 100k SYNC/ – MODE + + M2 + 50pF – 1.5V R SET OSC R FREQ + SHUTDOWN Y6 – GND Burst Mode OPERATION CONTROL applicaTions inForMaTion Operation ...

Page 8

LTC3824 applicaTions inForMaTion Burst Mode Operation The LTC3824 can be configured for Burst Mode operation to enhance light load efficiency (only 40µA quiescent current) and extend battery run time by leaving the SYNC/MODE pin open or pulling it higher than ...

Page 9

Inductor Selection The maximum inductor current is determined RIPPLE L(MAX) OUT(MAX – • OUT where I = RIPPLE f • OUT ...

Page 10

LTC3824 applicaTions inForMaTion on the P-channel switch duty cycle. At high input voltages the diode conducts most of the time the diode conducts only a small fraction of the time. OUT The worst condition for the diode ...

Page 11

Power MOSFET switching and condution losses OUT MOSFET OUT K )(C IN OUT RSS 2 3. The I R ...

Page 12

LTC3824 Typical applicaTion V IN 12.5V TO 60V + C IN1 33µF 100V 301k package DescripTion 1.88 ± 0.102 (.074 ± .004) 5.23 (.206) MIN 0.305 ± 0.038 (.0120 ± .0015) TYP RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) GAUGE PLANE ...

Page 13

... Updated Note 2 Updated Typical Application Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTC3824 ...

Page 14

... TSSOP-16E IN ≤ 60V, IN ≤ 0.93V , SSOP-28 IN ≤ 60V, IN ≤ 24V 50µA Q ≤ 36V, IN ≤ 10V 30µA/80µA Q ≤ 38V, IN ≤ 24V 50µA/170µA Q ≤ 38V 24V 60V, OUT(BUCK) OUT(BOOST) LT 0311 REV G • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 2006 3824fg ...

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